The most efficient wind power plants with a vertical axis of VAWT
Small vertical axis wind turbine (VAWT). This is a Darrieus (lift) type turbine. The NACA0018 blades are 50cm long and made from extruded aluminium. It turns very well by low wind. The angled blades seem to aid self starting and run very smoothly. More information at http://www.vertikal-windkraft-anlagen.de/produkte/h-rotor-rotorprofil-airfoilblade-symmetrisch-naca0018/
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